from django.shortcuts import get_object_or_404,render
from django.http import HttpResponseRedirect,HttpResponse
from django.template import loader
from django.http import Http404
from django.urls import reverse
# Create your views here.
from .models import Question,Choice


def index(request):
    # return HttpResponse("Hello world, You're at polls index")
    latest_question_list = Question.objects.order_by('-pub_date')[:5]
    # output = ', '.join([q.question_text for q in last_question_list])
    # template = loader.get_template('polls/index.html')
    context = {
        'latest_question_list':latest_question_list
    }
    return render(request,'polls/index.html', context)

def detail(request, question_id):
    try:
        question = Question.objects.get(pk=question_id)
    except Question.DoesNotExsit:
        raise Http404("Question does not exsit")
    return render(request,'polls/detail.html', {'question':question})

def results(request, question_id):
    response = "You're looking at the results of question %s."
    return HttpResponse(response % question_id)
def vote(request, question_id):
    question = get_object_or_404(Question, pk = question_id)
    try:
        select_choice = question.choice_set.get(pk=request.POST['choice'])
    except (KeyError, Choice.DoesNotExsit):
        return render(request,'polls/detail.html',{
            'question':question,
            'error_message':"You didn't select a choice.",
        })
    else:
        select_choice.votes+=1
        select_choice.save()
        return HttpResponseRedirect(reverse('polls:results',args=(question.id,)))
    

def results(request,question_id):
    question = get_object_or_404(Question,pk=question_id)
    return render(request,'polls/results.html',{'question':question})